Follow-up to r29742, minor fix, actually use the new copyfrom_rev variable.
Follow-up to r29742, minor fix, actually use the new copyfrom_rev variable.

* subversion/libsvn_client/merge.c
  (merge_file_added, merge_dir_added): Pass along the copyfrom_rev
  variable added in r29472 to svn_wc_add_repos_file2(), svn_wc_add(), and 
  svn_wc_add2().  There is no real functional change here, because the only
  time the copyfrom_rev variable will be different from what was previously
  passed is when the merge source is from a different repository.  In this
  case copyfrom_rev is always SVN_INVALID_REVNUM, which signals the three
  aforementioned functions to ignore copyfrom_rev entirely!  This is a long-
  winded way of saying this change is strictly in the interest of making the
  code a bit clearer.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion